” I dropped my panties, stepped out of them and climbed onto the stool. As Gill fastened the straps around my ankles I felt very exposed. I could fe...el the cool air around my bottom. My cock and balls nestled nicely in the hole in the seat back poking through. My cock was starting to grow again. Gill kissed me as she fastened the straps at my wrists. I was actually very comfortable and waited in anticipation for what was to come. My cock was growing rapidly. Gill reached down and grabbed my hard. Billy's prick stood up so hard and tight."What are you gonna do, Mother?" Billy choked, staring between her thighs."Hush!" she said, and when she felt the head of his cock at the slit of her cunt, she pushed downward. Slowly."Ohhhh, yes!" she moaned as she felt the pressure against her cunt, then the parting of her pussy lips. She lowered her crotch a little more, and the head of her son's cock penetrated her wet pussy. "Ohhhh, my God, Billy!"Donna held herself with the head of her son's cock. I was chained to a large (king size) double bed and to my right, four feet away was a bank of built in wardrobes. To my left a small living area with sofa, two chairs and a large LCD TV. I could also see an open door, leading to an ensuite bathroom. What was most strange about this room, was the fact it had no windows and opposite my bed, instead of a door, there was a set of bars, which I guess would be locked, imprisoning me in some sort of basement cell. There was no way I was leaving the. .." I gave a short chuckle which turned into a low groan as her thumb slowly did circles over the tip of my cock. "I know I said it was over and I'm sorry but it was then. It's just...... I liked it. Like it! It's just sex with....him. Honestly. I will stop. If you want me too?" She had a half smile on her face, she could feel my cock pulsing in her hand. "If it makes you like this, us like this... Fuck!!!" I groaned as she manipulated me. She giggled and tossed her cigarette onto the grass..